Move empty diagnostics workaround back into the server

editors/code/src/client.ts

@@ -99,22 +99,6 @@ export async function createClient(
         traceOutputChannel: traceOutputChannel(),
         outputChannel: outputChannel(),
         middleware: {
-            async handleDiagnostics(uri, diagnostics, next) {
-                // Workaround for https://github.com/microsoft/vscode/issues/155531
-                for (const diagnostic of diagnostics) {
-                    if (!diagnostic.message) {
-                        diagnostic.message = " ";
-                    }
-                    if (diagnostic.relatedInformation) {
-                        for (const relatedInformation of diagnostic.relatedInformation) {
-                            if (!relatedInformation.message) {
-                                relatedInformation.message = " ";
-                            }
-                        }
-                    }
-                }
-                next(uri, diagnostics);
-            },
             async provideHover(
                 document: vscode.TextDocument,
                 position: vscode.Position,